Eddie, enjoy reading your threads. Similar question as others, Stock 2003 DR-Z400S 3X3 is done, 1500 - 2500 feet, temps 70 - 105F very very low humidity most time 0-5-10% Just got my JD jet kit from thumpertalk, what jetting, needle & pilolet with Kientech exteneded fuel screw do you recommend. Is this correct. Main 155 Blue needle 4 clip 22.5 piolet Kientech 2.75 Runs good. Temp is cool today 60F, plug is a little on the whiter side then with stock jetting with 3X3. left plug is stock jetting & 3X3, right plug is above JD jetting with 3X3.